[Kea-users] DDNS limitations - ddns-qualifying-suffix vs domain-name

[Vladimir Nikolić]

Thanks Darren.

If ‘ddns-qualifying-subnet’ is being set on any level, it’s then appended to the ‘hostname’ value from the host reservation. ‘hostname’ is the FQDN, only if ‘ddns-qualifying-subnet’ is empty.
So it’s either one or another.
Which is really inflexible.

Regards 


> On 17 Oct 2023, at 12:26 am, Darren Ankney <darren.ankney at gmail.com> wrote:
> 
> Hi Vladimir,
> 
> The DHCPv4 domain-name option (15) isn't meant for use with ddns.  It
> is a search domain that the client should use when performing name
> resolution.  See: https://www.rfc-editor.org/rfc/rfc2132#section-3.17
> 
> You can set ddns-qualifying-suffix at the global, shared-network and
> subnet level.  In a host reservation, you can use the "hostname"
> parameter to specify a FQDN to send to the client and for use in DDNS.
> See here: https://kea.readthedocs.io/en/kea-2.4.0/arm/dhcp4-srv.html#reserving-a-hostname
> 
>> On Mon, Oct 16, 2023 at 3:23 PM Vladimir Nikolic via Kea-users
>> <kea-users at lists.isc.org> wrote:
>> 
>> Hi,
>> 
>> While trying to migrate DHCP service from ISC DHCP to ISC KEA, we are
>> hitting following KEA limitations:
>> 
>> - option domain-name has no part in DDNS names construction, it's only
>> ddns-qualifying-suffix that's being honoured
>> - ddns-qualifying-suffix can't be specified in the class definition (we
>> have dedicated zone for our OOB devices)
>> - there can be only one DDNS zone for all the clients in a subnet
>> (ddns-qualifying-suffix), with ISC DHCP you can have one default
>> domain-name for a subnet and every single host reservation with a
>> different domain-name (DDNS zone)
>> 
>> Regards,
>> Vladimir
>> --
>> ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information.
>> 
>> To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users.
>> 
>> Kea-users mailing list
>> Kea-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/kea-users
> -- 
> ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information.
> 
> To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users.
> 
> Kea-users mailing list
> Kea-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/kea-users